Interlock for roll-holding cameras of extrusion-loading type



W 1955 R. E. KESEL ET AL INTERLOCK FOR ROLL-HOLDING CAMERAS OFEXTRUSION-LOADING TYPE 3 Sheets-Sheet 1 Filed April 4, 1951 FIG. 2 "2 N6 L0 Em a; m m u n m F m w M m u Em I B 3 u 0 m m 0 I mw H 6 I A m M 5 47 7 m w 'Juvcntors Ottorncgs Nov- 29, 1955 R. E. KESEL ET AL 2,725,004

INTERLOCK FOR ROLL-HOLDING CAMERAS OF EXTRUSION-LOADING TYPE Filed April4, 1951 3 Sheets-Sheet 2 l0 '2 FIG 7 A [Hm I in: [05 "g I l-lllllllflliI04 45 i 64 in mm .m I13 ii 71 W] m g 76 f F I G 8 ROBERT E. HESEL-HERBERT T. ROBINSON llmentors Q Mf (llitornegs Nov. 29, 1955 R, E.KESEL ET AL 2,725,004

INTERLOCK FOR ROLL-HOLDING CAMERAS 0F EXTRUSION-LOADING TYPE Filed April4, 1951 3 Sheets-Sheet 3 ROBERT EJGSSEL HERBERT T. ROBINSON Smoentors(Ittornegs United States Patent i in This invention relates toroll-filmcameras, and more particularly to a camera interlockingmechanism for controlling the relative operation of a-film-windingmechanism' and a shutter trigger. One object ofo'ur invention is toprovide a mechanism suitablefor any roll-film cameraybut particularlysuitable for aroll-film camera of the so;called' extrusion-loading type;That is, a camera of the type in'jwhich film is placed on aspool-winding shaft ;from which it is extruded into a'loos'e coil in aspoolchamber, after which it is wound back on the original spoolintermittently making exposures as the filmis rewoundx Another object ofourinvention is to provide a mechanism of the class described" in whichthe liability ofimproperly operating the camera mechahism or m akingidouble exposures-"isreduced to a minimum. Still; another object ofourinventionis to provide an interlock between a film-winding mechanism, ashutter-s etting-mechanism and a shutter trigger which will render thecamerasubstantially,foolproof. Other objects will appear from thefollowing specification. the novel features beingparticularly pointedout in the" clairns at the end-thereof.

In interlocking mechanisms for controlling the relative operation of afilm=windingmechanism, a shutter se'tting mechanism and a shuttertrigger, and particularly in such mechanisms as appliedtdextrusiomloadirig' c'a'm'e ras, a number ofdifliculties are ordinarilyencountered. With extrusion-loadingcameras, the'film is wound ona flangespool, the spool flanges in turn having inwardly-extend ing rim's' orbeads afound the edges of thefilm so that the film must'be bowed inpassing between'the' flanges;

The; contact between'the film and these beadsis partially relied upon,at least to cause the film'to'be' extruded and, consequently, theremaybe some lost motion'be tweenthe'fil'm' and the spool fromwhichitis'extrude'd.

Thus, with cameras of the extrusiomloading type)- a'nyf 50 automaticwinding mechanism shouldallow for soml'os't motion betweenthe 'film' andthe winding key in properly positioning the first area for expo'si'lre,and the'film" metering mechanism should also provide' for both theleader and the tail stripsto be wo'und'in moving: the film toand'from'the film spool;

Our present mechanism is particularly designdtoad' vance film" equal toan exposure area plus suitablesp'acing between exposures.The'filmmetering'control which is the subject of our copendingapplication Serial No. 219,211, filed April 4, 1951, Two-Way FilmMetering Device,;now Patent 2,629,563, granted February" 24) 1953-,deals in'detail with thestructure'of the counter mechanism which is alsoshown in the present applica= tion in its proper relationship totheinterlocking mach:

anism. We also have a 'copendihg application Serial No. 197,220 forCamera Shutter With Two Successively Op= erated Blades, filedNovember24', 19 50,-" now Patent 2, 621 ,570, .gr'anted December; 1 6,;1952,-showingspecific details of the shutter used herein.

coming now to the drawings wherein like refei'ence cliaracter's'"denotelike parts throughout;

2,725,004 Patented 29,

Fig-3" l is-aperspective view of a typical camera which may beconstructed in accordance with, andmay embody, a' preferred form of ourinvention; n

Fig. 2' is an enlarged front elevation of a portion of the cameramechanism removed from the camera and showing the camera shutter andassociated pa'rts;"

Fig. 3 is an enlargedfragmentary top" plan view of a portion of thefilm' me'tering mechanism and its'actuat- :..p

Fig. 4 is a fragmentary part-section. part-elevation taken'on; line 44of Fig. 2;

Fig. 5 is a fragmentary detail section taken on line 5-5 of Fig. 6;

Fig. 6 is afragment'ary top planview of the interlock mechanism showingthe relationship of associated parts with parts being omitted forclearness. In this view; the camera has had the film wound and the partsare ready for an exposure to bemade;

Fig.' 7 is a' side elevation; partly in section, through a portion ofthe mechanism shown in Fig; 6;

Fig: 8 is aview similar to Fig. 6, but with the parts in the position towhich they may have been moved in winding the shutter, but with the filmwinding only partially completed;

Fig, 9 is a top plan of ametering'ratchet and its associated cam; W

Fig. 10 is jaview similar to'Fig: 6 but with the interlocking mechanismin a position through which the parts pass during the film-extruding,operation;

Fig. 11 is a fragmentary detail section taken on line 11-11 of Fig;IOandshowing; in addition, the'winding Qbk Fig: 12; isa fragmentarysection taken through the counter dial and metering mechanism on line12-12 of Fis .1

J Fig- 13 is anexplodedview showing the film counting dial the meteringratchet and the ratchet cam;

Fig. l 4 is a" top plan view of a counter dial;

Fig.- 15 is a fragmentary det'ail perspective view of a part of theshutter mechanism' and'the shutter setting and; the slide stop'releasing :device.

I Qur invention comprises broadly ar'iinterlock between awindingfmechanism" formovingfilm in an unwinding and a winding updirection, a mechanism for spacing filrnduringfthe rewinding movementfor exposures, these interlocking elements cooperating with a shuttertrigger to pennitoperation of'the trigger only when film is properlypositioned for; exposure. Our mechanism may operate a signal in thefinder to indicate the position of the interlocking parts.

A5 indicated in Fig: 1; a typical camera may consist fjaa cam'era body1- having a front wall 2' supporting an objective 3; The camera may havecurved end walls 4 and 5,' the former enclosing a'portion' of afilmspool receiving chamber'G, and the latter enclosing a portion of v afilm jch amber 7 into which film may be extruded. These two filmchamberslie on opposite sides of an exposure frame S gacrosswhich filmliesduring an exposure;

A top wall 9 of the camera may support'afihn winding knqbi'lO passingdown through the topwall 'and'turning a film spool shaft 11 whichsupports'film to be exposed. The winding knob 10, Fig. 11-, may includea cover 200 held qn by screws 20 1. Underneath the cover 200 there is aespring washer 202 to frictionally' engage a collar 203" on" thefilm-winding shaft 11. There may also be a spring washer204'pressingdown on ratchet 57 from which the posts extend downwardly intothe path'of an arm 55 on slide 45 as will be hereinafter described. Abearing 205 in mechanismplate 46 revolubly supports the windin gxjkeyshaft l lz. The winding knob 10, the shaft 11-- and ratchet wheel 57allturn together and may be referred to broadly as the winding knob. Theshaft 11 is polygonal in cross section, here triangular, to drivinglyengage a complementary configuration in a film spool, all as is wellknown.

A trigger 12 may also be mounted on the top wall 9 of the camera, andpreferably this wall carries a window 13 through which a numeral 14 onan exposure counter may be viewed. There is a view finder 15, preferablyhaving a negative lens 16 in the front and a positive lens 17 in therear, as shown in Fig. 10.

Referring to Fig. 2, the camera may have a shutter of the same generaltype as shown in our application Serial No. 197,220, filed November 24,1950 above referred to, in that an exposure aperture 13 in a frontmechanism plate 19 may permit light to pass for an exposure when a coverblind 29 and a shutter blade 21 are moved in the following manner.

The shutter blade 21 normally lies over the exposure aperture 18, and itmay be operated by a spring 22 resting against a pin 23 and a lug 24 onthe shutter blade, thereby tending to hold a pin 24 in the end of a slot25. This pin 24 may be engaged by a lug 26 on the cover blind 29 so thatwhen this blind is moved in the direction shown by the arrow, lug 26will strike and move the pin 24 and rotate the shutter blade 21 into aposition in which the spring 22 is set and the shutter blade 21 islatched by means of a latch element 27 engaging a latch element 28 onthe shutter blade. At the same time, a second latch element 29 carriedby lever 30, pivoted at 31, will engage a lug 37 on the cover blind. Inthe set position, the spring 32 encircling the cover blind shaft 33 andhaving one end 34 engaging a pin 35 while the other end 36 engages a pin37 on the cover blind will be wound up and tensioned and the parts willbe ready for an exposure.

The shutter release 12 may operate a downwardlycxtending plunger 38 torock the release lever 41 and with it lever 30. As lever 41 rocks aboutits pivot 411, lug 412 carried by lever 41 may engage and turn shoulder413, moving lever 30 to release latch element 29 from 37 so that thecover blind 20 may turn under the impulse of its spring 32 until a lug39 strikes and moves a shoulder 40 carried by the lever 30, at whichtime further movement of lever 30 will take place so that latch element27 may release latch element 28. By disengaging latch element 27 fromthe trigger latch element 28, the shutter blade 21 will rapidly closethe aperture 18 after it has been uncovered by the cover blind 20. Quickopening and closing movements are obtained. As thus far described, theshutter mechanism is quite similar to that shown in the above-mentionedpatent.

The method of setting the shutter and the interlocking mechanism whichwill now be described, however, is new with this application.

We provide a slide mounted to move on a mechanism plate 46 as shown inFigs. 4, 5, 6 and 12. The mechanism plate may support upstanding pins 47and 48 which may pass through slots 49 and 50 in the slide 45 to controlthe extent of the movement of this slide. The slide may be provided witha pin 51 against which a spring 52 may press, according to its position,this spring being somewhat heavier than a second spring 53 which maypress on the upstanding pin 47 according to the position of the slide.The tendency of these two springs is to hold the pin 51 with the slide45 in a position in which the pins 47, 51 and a stud 54 are all insubstantial alignment. However, this position is never reached while theslide is at rest. When the film has been wound and the parts are in aposition for exposure, as indicated in Fig. 6, it will be noticed thatan arm 55 on the end of the slide lies in the path of the two pins 56carried by the ratchet 57. Thus, the ratchet wheel cannot be turned inthe direction shown by the arrow because the slide 45 is held againstmovement by a shoulder 58 which lies in engagement with a pivoted stop59, which may consist of a lever 60 pivoted at 61 to the mechanismplate.

4- Therefore, if an effort be made to turn the winding knob 10 to windfilm, this could not be done when in the Fig. 6 position.

If an effort should be made to turn the winding knob 10 in a reversedirection, this also could not be done because of the pawl 63 pressedinto engagement with the ratchet teeth 64 by means of a suitable spring65. This pawl may turn about its pivot 66 and is provided with a handle67 extending through a rear wall of the camera 68, Fig. 1, and into anoperative position so that in extruding the film this pawl may be movedin the direction shown by the arrow, Fig. 6, to the position shown inFig. 10, wherein the knob 10 may be turned to move film from chamber 6to chamber 7. As above pointed out, Fig. 6 shows the parts ready for anexposure. The film cannot be wound. An operator may then press thetrigger 12. This can be done because there is a curved notch 70 whichlies in a position to permit a flange 71 to pass the slide 45 and, asthe trigger 12 is depressed, the plunger 38, Fig. 2, will release theshutter as pointed out above. A spring 71 Fig. 4, pressing on collar 71,holds the trigger raised, but when the trigger 12 is depressed, plunger38 strikes a flange 41' on lever 41.

When this releasing movement takes place, a pivoted shutter arm 72,carried by an upper flange 73 of the cover blind 20, moves an arm 74,Fig. 5 and Fig. 15, against a downwardly-extending post 75, carried bylever 82 and above which is the latch arm 60 as shown in Figs. 5 and 6.This arm 74, therefore, moves the post 75 about the pivot 33 in aclockwise direction with respect to Fig. 5 or toward the left of thedrawing with respect to Fig. 6, allowing spring 87 to move and releasingthe latching lug 59 from the slide shoulder 58 as hereinafter described.When released, the slide may be moved when film is wound because pin 56may move the shoulder 55 to the right with respect to Fig. 6, thecontinued movement causing the parts to reach the Fig. 8 position, inwhich position the shutter has been wound by means of thedownwardly-extending lug 76, carried by slide 45, striking the curvedflange 77 of the cover blind 20 and moving it until the shutter is set.

Fig. 8 shows the position of the parts when the shutter is set, butmovement of the winding knob 10 continues and pin 56 will, therefore,slip off arm 57 of the slide 45, at which time the less powerful spring52, pressing on pin 51, will move the slide to the left, or almost asfar as shown in Fig. 10, and toward a position in which the pins 47, 51and the stud 54 will lie in a straight line. It will be noticed that assoon as the slide 45 moves from its Fig. 6 position, it prevents thetrigger 12 from being operated because a portion of the slide will liebeneath the flange 71 and, consequently, will not permit downwardvertical movement of the trigger a sufiicient distance to make anexposure. When the slide 45 moves under the impulse of spring 52, itwill move so that the curved notch 70 lies to the left with respect tothe Fig. 10 position of the trigger 12, and the trigger cannot beoperated until the movement of the slide in a reverse direction occursthrough contact of a pin 56 with the arm 55. On this second movement ofthe'slide to the right with respect to Fig. 6, the shoulder 58 is againengaged by the stop element 59 so that not only is the slide 45 halted,but the movement of the winding key 10 is halted and the parts are againin a position for exposure.

We prefer to provide a signal in the finder 15 to indicate to anoperator when the camera is in condition for exposure. As indicated inFig. 10, the finder may consist of a front finder element 16 and a rearelement 17 and in between there is a hinged signal 78. This signal ispreferably a colored filter, such as a red filter, and it consists of asheet of material pivotally mounted at 73 to a stud 80, there being anarm 81 extending outwardly and into the path of a lever 82 pivoted at 83to the mechanism plate. A spring 84 tends to turn this lever in thedirection shown by the arrow in Fig. 10 to rotate the signal? 78: fromits operative position shown in Fig. i to an inoperative position'asshown, for instance, in Figs. 6 and '8. Lever82 carries thedownwardly-extending pin 75 which is used to coast with thecover'blind'20 sothat when-an arm 74 on the cover blind lies inits'normal rest position, as shown in Figs. 2 and 15, it will contactthe pin 75- swinging a lever 82 in a clockwise direction towards thepositionshown in-Fig. 10. In this position the latchelement 59' has beenremoved from the latch element-58"carriedby the slide 45. The slide isnot latched and in Fig.- 10 thisis because the parts are in afilmextruding; position. The position of the signal 78, of course, wouldindicate by a red glare in the finder that a picture -should not beattempted.

The levers 60 and 82 are pressed toward each other by means'of-spring8'7 encircling: a sti1d-88-and having arms SS -and 86 sothat theselevers tend to remain in the relationship, shown-or pressed'together asin Fig. 10. A second spring 89, resting on-the stud 54" at one end andagainsta-lugQt) on the lever 82 at the other end, tends'to swingbothlevers in a counterclockwise direction about their pivots so that thelatch element59 will be contacted with the slide 45-. However, thismovement is opposed-by'the pin 75, and the cover blade in the Fig.po'sition'will hold 'the pin so that both levers 60 and 82 lie outofcontact with the slide 45.

While this signal is not essential, it is very useful so that anoperator'can tell in what position the various interlocking parts lie,particularly. after the camera hasnot been: used for some time.

We provide a-counting mechanism which is unique in that-this countermust work in two diflerentdirections in order to function properlythatis, on one direction whilethefilrn isbeingextruded, and ma seconddirection when the film is being moved in a reverse-direction whileexposures-are being made. Referring to Figs- 12 to 14 of the drawings,the counter may consist of a counter disk 100, as shown in Fig. 14,bearing'the scale 101 graduated into the'desired number of unitsindicating exposures and Y numerals 14 at intervals if desired. Thisdisk is perforated'at-102so that a pair of spaced pins, as shown in Figs13, may pass through these perforations-to turn'the disk with thetwo-way ratchet wheel 104. The pins 103 extend upwardly from the ratchetthrough the apertures 102,-as shown in Fig. 12, and-a spring washer105-preferably creates the desired frictionbetween the'counter disk 100and the recessedwall 1060f the camera. The twoway ratchet 104'isprovided with-teeth or serrations-"107 spaced equally apart, and at onearea there is'a recess 108 of greater depth-and width than the teeth 107Below'the'ratchet 104 there is a cam 109whic-h may beintegralwithorwhich may be formed by a separate piece attached to the two-wayratchet 104;

In order to actuate this ratchet, there is a doubleended pawl 110, bestshown in Fig. 10: This pawl has upstanding ends 111 and 112 and it ispressed-against.a pair-of spaced pins 113 and 114 on-the slide- 45.Since thedouble-ended pawl 110 is slotted at 115-to receive a stud 116,it may normally lieagainst the pins 113'and 114 because of the pressureof a spring 117 which encircles the stud 116 and which has ends pressingthe flanges 111 and112 in the direction shown by the arrows in Fig. 10.

Each'timethe slide 45 moves, a pawl-that is, either the-upstandingfiange111 or the upstanding flange'112,

may engage a ratchet tooth'107. Referring to Fig. 3,

the ratchet is operating to turn the disk 100 one step at' reaches thecut-out 108, further movements of the slide 6 45' willnierelyi causethe" pawl 112 to idle; and the counter disk? will remain stationarybecause the toothed wheel" 104 will not be moved? Thu's,'aft s movementofthe pawl 112- in'the noteh--108'-,film ma 'ss wound to wind up thetail strip without lo'c'kin'g thefilm as occurs f0r each exposure.

Fig; 1-0 shows the operation of the counter during the film-extrudingmovement's-in which pawl l lloper'ats the ratchet wheel 104' as abovedescribed. In thisin's't'ance it will be-note'd that the pins 56 engagethe" inside' and of the arm 55 of the slide 45 and, consequently,movei't" intermittently to the left with respect to this figure. Ratchetwheel 104' turns on a stud 104 '"carr'ied by the mechanism plate' 4 6.when film'is to be measured 'aae returned to spool chamber 6,the'op'veratioii of the 'win ingkey 10' turns the ratchet 104' one stepata ti'riiej b t in an opposite direction and through the engageinn'tFof pawl 111 and the opp'ositeside of the ratchet teet 107, butduring: this' movement the operationis the same that the ratchet wheel104" is moved a distance" e'q'ual' to one too't'heach time a pin 56m'oves'the'arm' 55 tat-move the slide 45a sufficient distance'for thisaction*to jtake" place. When the pawl 111 reaches the notch l08'andjconsequently, when the idling position of the counter disk" 10 0 isreached, further movement can take placetowind thefilm' completely onthe film spool shaft 11 after the last exposure has been-made.

Thus, it will be seen that, with the above-described counter mechanism,provision is'maderor windingthe leader and tail strips of the filmWithout movihg the" counting disk; It should'bepointe'd out' thatin b'oth enjdsj of the movement, the cam 109 comes into-play in tlia'tthe-raised portion-119 moves-beneath theupturned'ar rn" 120 of the lever82 when the ratchet 104 isturned s6 that a'p'awl may'idle in the cut-out108; This preventsthe stop' lever 59' from dropping down into asteppingposition'with respect to the Iatchinglug'SS onthe'" slide" 44 and,consequently, winding can takeplace without" this slidebeing'heldagainst movement'. Thus, thec titer disk 101is' always synchronizedproperly-with respect to the film movement in either'directi'on and,whe'ii the-filr'ri is* being moved for exposures by' being returned tothe; winding key shaft 11, the'window14" in*the"topwall 9 of the cameracan be used to tell which graduatiomlllfor 14' is in position and,-consequently,'how many-exposures'have been made.

From the above specification and drawings, it will" appear that we haveprovided an interlocking a'iid couriting mechanism which are welladapted to carry out th variousobjects of our invention, audit isobvioustha'f structural changes may occur tothose skilled in"the aft'.'We, therefore, wish it understood that theenibodim'exits disclosedherein-are by way of illustration only, andare not to be used in alimiting sense.

Having thus described our invention,- what'we cIa'i'I'nis new and desireto secure by Letters Patent of the United States is:

1. A camera interlocking mechanism for controlling} the relativeoperations of a film-winding'mechanisni arid"- a shutter trigger forcameras of a roll-film'type'andcom prising a camera body, an exposureaperture 'therein', spoo1 chambers on each side of the exposureaperture, a setting type of shutter mechanism includingamovableset'ting' member, shutter members for opening and closingtlre"shutter aperture, a lever arm havinga' r'es't and aset' position, alatch for holding the shutter meinbersin a set position, said latchbeing releasable by the'lever arm; a trigger for releasing said latch, afilm windingknob, a shaft carrying the knob, a winding-knob pin movablewith the shaft and knob, a slide mounted on thecamera and movable by thewinding knob pin through movement'- of the knob, a spring tending tohold the slide in an inter shutter mechanism 'setting' lever to I settheshutt'ei, 'tlic trigger including a flanged hub lying adjacent to theslide whereby the slide may engage the flanged hub and restrain thetrigger from movement except when the slide is in a releasing position,a slide stop for holding the slide in a trigger releasing position,means for releasing the slide stop comprising a lever and pin, the pinextending into the path of the shutter mechanism lever having a rest anda set position to be moved thereby as the lever moves from a set to itsrest position, and a spring moving the slide stop to release the slidewhen the lever moves as the shutter is released.

2. A camera interlocking mechanism for controlling the relativeoperations of a film-winding mechanism and a shutter trigger for camerasof a roll-film type and comprising a camera body, an exposure aperturetherein, spool chambers on each side of the exposure aperture, a settingtype of shutter mechanism including a movable setting member, shuttermembers for opening and closing the shutter exposure aperture, a leverarm having a rest and a set position, a latch for holding the shuttermembers in a set position, said latch being releasable by the lever arm,a trigger for releasing said latch, a film winding knob, a shaftcarrying the knob, a winding knob pin movable with the shaft and knob, aslide mounted on the camera and movable by the winding knob pin throughmovement of the knob, a spring tending to hold the slide in anintermediate position between two extremes of movement, a protuberanceon the slide for engaging and moving the shutter mechanism setting leverto set the shutter, the trigger including a flanged hub lying adjacentto the slide whereby the slide may engage the flanged hub and restrainthe trigger from movement except when the slide is in a releasingposition, a slide stop for holding the slide in a trigger releasingposition, means for releasing the slide stop comprising a lever and pin,the pin extending into the path of the shutter mechanism lever having arest and a set position to be moved thereby as the lever moves from aset to its rest position, and a spring moving the slide stop to releasethe slide when the lever moves as the shutter is released, the stop forholding the slide in a releasing position also holding the slide in anintermediate position, whereby the winding knob pin, the shaft and thewinding knob may be prevented from moving in one direction.

3. A camera interlocking mechanism for controlling the relativeoperations of a film-winding mechanism and a shutter trigger for camerasof a roll-film type and comprising a camera body, an exposure aperturetherein, spool chambers on each side of the exposure aperture, a settingtype of shutter mechanism including a movable setting member, shuttermembers for opening and closing the exposure aperture, a lever armhaving a rest and a set position, a latch for holding the shuttermembers in a set position, said latch being releasable by the lever arm,a trigger for releasing said latch, a film winding knob, a shaftcarrying the knob, a winding knob pin movable with the shaft and knob, aslide mounted on the camera and movable by the winding knob pin throughmovement of the knob, a spring tending to hold the slide in anintermediate position between two extremes of movement, a protuberanceon the slide for engaging and moving the shutter mechanism setting leverto set the shutter, the trigger including a flanged hub lying adjacentto the slide whereby the slide may engage the flanged hub and restrainthe trigger from movement except when the slide is in a releasingposition, a slide stop for holding the slide in a trigger releasingposition, means for releasing the slide stop comprising a lever and pin,the pin extending into the path of the shutter mechanism lever having arest and a set position to be moved thereby as the lever moves from aset to its rest position, and a spring moving the slide stop to releasethe slide When the lever moves as the shutter is released, the stop forholding the slide in a releasing position also holding the slide in anintermediate position, whereby the winding knob pin, the shaft t.) andthe winding knob may be prevented from moving in one direction, aratchet wheel on the shaft carrying the knob, and a spring-operated pawlnormally engaging the ratchet and preventing the knob from being turnedin a reverse direction when said slide lies in a trigger releasingposition.

4. A camera interlocking mechanism for controlling the relativeoperations of a film-winding mechanism and a shutter trigger for camerasof a roll-film type and comprising a camera body, an exposure aperturetherein, spool chambers on each side of the exposure aperture, a settingtype of shutter mechanism including a movable setting member, shuttermembers for opening and closing the exposure aperture, a lever armhaving a rest and a set position, a latch for holding the shuttermembers in a set position, said latch being releasable by the lever arm,a trigger for releasing said latch, a film winding knob, a shaftcarrying the knob, a winding knob pin movable with the shaft and knob, aslide mounted on the camera and movable by the winding knob pin throughmovement of the knob, a spring tending to hold the slide in anintermediate position between two extremes of movement, a protuberanceon the slide for engaging and moving the shutter mechanism setting leverto set the shutter, the trigger including a flanged hub lying adjacentto the slide whereby the slide may engage the flanged hub and restrainthe trigger from movement except when the slide is in a releasingposition, a slide stop for holding the slide in a trigger releasingposition, means for releasing the slide stop comprising a lever and pin,the pin extending into the path of the shutter mechanism lever having arest and a set position to be moved thereby as the lever moves from aset to its rest position, and a spring moving the slide stop to releasethe slide when the lever moves as the shutter is released, a ratchetwheel having teeth, and

a notch of greater width than a tooth and mounted on the camera, and apawl for operating the ratchet wheel carried by the slide, turning theratchet wheel step by step in one direction until said notch is reached,at which time the pawl may move idly.

5. A camera interlocking mechanism for controlling the relativeoperations of a film-winding mechanism and a shutter trigger for camerasof a roll-film type and comprising a camera body, an exposure aperturetherein, spool chambers on each side of the exposure aperture, a settingtype of shutter mechanism including a movable setting member, shuttermembers for opening and closing the exposure aperture, a lever armhaving a rest and a set position, a latch for holding the shuttermembers in a set position, said latch being releasable by the lever arm,a trigger for releasing said latch, a film winding knob, a shaftcarrying the knob, a winding knob pin movable with the shaft and knob, aslide mounted on the camera and movable by the winding knob pin throughmovement of the knob, a spring tending to hold the slide in anintermediate position between two extremes of movement, a protuberanceon the slide for engaging and moving the shutter mechanism setting leverto set the shutter, the trigger including a flanged hub lying adjacentto the slide whereby the slide may engage the flanged hub and restrainthe trigger from movement except when the slide is in a releasingposition, a slide stop for holding the slide in a trigger releasingposition, means for releasing the slide stop comprising a lever and pin,the pin extending into the path of the shutter mechanism lever having arest and a set position to be moved thereby as the lever moves from aset to its rest position, and a spring moving the slide stop to releasethe slide when the lever moves as the shutter is released, a ratchetwheel having teeth, and a notch of greater width than a tooth andmounted on the camera, and a pawl for operating the ratchet wheelcarried by the slide, turning the ratchet wheel step by step in onedirection until said notch is reached, at which time the pawl may moveidly, and a cam positioned by the ratchet wheel to hold the slide stopinoperative when the pawl lies in the notch, thereby pre venting theslide from coming to rest in an exposure making position.

6. A camera interlocking mechanism for controlling the relativeoperations of a film-winding mechanism and a shutter trigger for camerasof a roll-film type and comprising a camera body, an exposure aperturetherein, spool chambers on each side of the exposure aperture, a settingtype of shutter mechanism including a movable setting member, shuttermembers for opening and closing the exposure aperture, a lever armhaving a rest and a set position, a latch for holding the shuttermembers in a set position, said latch being releasable by the lever arm,a trigger for releasing said latch, a film winding knob, a shaftcarrying the knob, a winding knob pin movable with the shaft and knob, aslide mounted on the camera and movable by the winding knob pin throughmovement of the knob, a spring tending to hold the slide in anintermediate position between two extremes of movement, a protuberanceon the slide for engaging and moving the shutter mechanism setting leverto set the shutter, the trigger including a flanged hub lying adjacentto the slide whereby the slide may engage the flanged hub and restrainthe trigger from movement except when the slide is in a releasingposition, a slide stop for holding the slide in a trigger releasingposition, means for releasing the slide stop comprising a lever and pin,the pin extending into the path of the shutter mechanism lever having arest and a set position to be moved thereby as the lever moves from aset to its rest position, and a spring moving the slide stop to releasethe slide when the lever moves as the shutter is released, a ratchetwheel having teeth, and a notch of greater width than a tooth andmounted on the camera, and a pawl for operating the ratchet wheelcarried by the slide, turning the ratchet wheel step by step in onedirection until said notch is reached, at which time the pawl may moveidly, and a cam positioned by the ratchet wheel to hold the slide stopinoperative when the pawl lies in the notch, thereby preventing theslide from coming to rest in an exposure making position, said pawlhaving two operative ends for engaging the ratchet wheel, the first onefor moving the ratchet in one direction and the second one for movingthe ratchet in a reverse direction.

7. A camera interlocking mechanism for controlling the relativeoperations of a film-winding mechanism and a shutter trigger for camerasof a roll-film type and comprising a camera body, an exposure aperturetherein, spool chambers on each side of the exposure aperture, a settingtype of shutter mechanism including a movable setting member, shuttermembers for opening and closing the shutter exposure aperture, a leverarm having a rest and a set position, a latch for holding the shuttermembers in a set position, said latch being releasable by the lever arm,a trigger for releasing said latch, a film winding knob, a shaftcarrying the knob, a winding knob pin movable with the shaft and knob, aslide mounted on the camera and movable by the winding knob pin throughmovement of the knob, a spring tending to hold the slide in anintermediate position between two extremes of movement, a protuberanceon the slide for engaging and moving the shutter mechanism setting leverto set the shutter, the trigger including a flanged hub lying adjacentto the slide whereby the slide may engage the fianged hub and restrainthe trigger from movement except when the slide is in a releasingposition, a slide stop for holding the slide in a trigger releasingposition, means for releasing the slide stop comprising a lever and pin,the pin extending into the path of the shutter mechanism lever having arest and a set position to be moved thereby as the lever moves from aset to its rest position, and a spring moving the slide stop to releasethe slide when the lever moves as the shutter is released, a ratchetwheel having teeth, and a notch of greater width than a tooth andmounted on the camera, and a pawl for operating the ratchet wheelcarried by the slide, turning the ratchet wheel step by step in onedirection until said notch is reached, at which time the pawl may moveidly, and a cam positioned by the ratchet wheel to hold the slide stopinoperative when the pawl lies in the notch, thereby preventing theslide from coming to rest in an exposure making position, said pawlhaving two operative ends for engaging the ratchet wheel, the first onefor moving the ratchet in one direction and the second one for movingthe ratchet in a reverse direction, the direction of movement of theknob and consequently the direction of movement of the slide controllingthe pawl to engage and move the ratchet wheel, the knob, shaft andwinding knob pin operated thereby being engageable with an end on theslide having two sides, one side at a time being engageable with theslide.

8. The camera interlocking mechanism for controlling the relativeoperations of a film winding mechanism and a shutter trigger for camerasas defined in claim 7 characterized in that the slide stop holding camis afiixed to the ratchet wheel to turn therewith whereby said slidestop may be released when either of the two pawls lie in the notch ofthe ratchet wheel to idle therein, and whereby operation of the triggermay be prevented.

9. The camera interlocking mechanism for controlling the relativeoperations of a film winding mechanism and a shutter trigger for camerasas defined in claim 7 characterized in that the slide stop holding camis aflixed to the ratchet wheel to turn therewith whereby said slidestop may be released when either of the two pawls lies in the notch ofthe ratchet wheel to idle therein, and whereby operation of the triggermay be prevented regardless of the direction of movement of the windingknob, and means operable by movement of the winding knob in a reversedirection for engaging the pawl spaced from the notch in the ratchetwheel with a tooth of the ratchet wheel and moving it and the cam to aslide stop releasing position.

References Cited in the file of this patent UNITED STATES PATENTS2,028,752 Burger Ian. 28, 1936 FOREIGN PATENTS 213,437 Switzerland May1,1941

